三相变压器高低压线电压之间的角度差为（   ）的整数倍。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69321' and id < 4487855 and id<>'4487855' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69321' and id > 4487855 and id<>'4487855' order by id asc limit 5